Double throw switch



May 8 1934- w. QUANTE 1,957,666

DOUBLE THROW SWITCH Filed May 6. 1931 kw 5W@ i ,www

Patented May s, 1934 UNITED STATES PATENT OFFICE DOUBLE THROW SWITCHWilhelm Quante, Wuppertal-Elberfeld, Germany Application May 6, 1931,Serial No. 535,427 In Germany May 9, 1930 1 Claim.

The invention relates particularly to throw over switches adapted tocontrol a plurality of lines. Throw over switches are known which arearranged side by side on a common axle. Such switches are likewise knownin which the individual levers can be independently operated. Further itis known to construct the switching levers as knife contacts. Theinvention consists in that these independently operatable switchinglevers are arranged side by side on a common axle and are provided withthree pairs of contact knives arranged in cross-shape and engage incontact springs. By the combination of these features it is possible toarrange all terminals as close as possible in order to enable the switchto be used for various purposes, for example as separate throw overswitch, as multiple throw over switch, as collector switch, as testingswitch, as line selector and the like without long connecting wires.Moreover by this arrangement the terminals are clearly visible andeasily accessible.

In order to prevent all interruption of the current ow when changingover from the main line to the branch line, one pair of contact knives,according to the invention, always remains in contact with thecoordinate terminal connected to the main line irrespective of theposition of the lever.

An embodiment of the invention is illustrated by way of example in theaccompanying drawing in which:

Fig. 1 shows the switch in top plan view.

Fig. 2 is a section on line 2-2 of Fig. 1.

Fig. 3 is a section on line 3 3 of Fig. 1.

The casing consists of a base a pressed from insulating material,further of a supporting plate b also pressed from insulating material,and of a cover c of insulating material. Pairs of springs d', d2 and d3are fixed on the supporting plate b. These pairs of springs areconnected to the terminals e', e2 and e3. The main circuits areconnected to the terminals e3, whereas lines leading to the substationsare connected to the terminals e and those to the central station to theterminals e2. An axle f, journaled in the side walls of the base a,extends transversely through the casing. The switch levers h pressedinto the bearing part g are mounted side by side on this axle. One pairof each of the cross-shaped contact knives are also pressed into thisbearing part g. The knives i, k and Z are produced by the crossshape.The knife l is wide, so that it remains in contact with the contactspring d3, irrespective of the position of the lever. The contact 1cengages the spring d2. Consequently, the oicial line is switched to thecentral station. If the lever is thrown upwards, the knife 1c disengagesfrom the spring d2 and the knife i engages the spring d', so that theofficial line is switched to the branch station. If the switch lever isin the medium position, both the contact knife 1c and the contact knifei are disengaged from both contact springs, so that both the centralstation and also the branch station are switched out. The xing of theswitch levers h is eiected by screws o', o2 and o3. Between screw andswitch lever a bar n is fixed as desired which, in the example showninterconnects all the cylinders so that, when one switch lever is moved,all the switch levers are actuated. If it is desired to actuate the twoextreme cylinders or switch levers together and to leave the middlelever inoperative, the bar 1L is set oil over the middle screw o2 sothat only the two extreme cylinders are rigidly connected with thescrews o and o3.

On the cover c a marking table m is arranged, which is divided into twosections, on which the position of the lever is indicated.

I claim:

A throw over switch for a plurality of lines to be switched separately,comprising in combination a common axle, independently actuated pairs ofcontact knives arranged in cross shape on said alxle, angular switchlevers connected at one end to said pairs of contact knives, the freearms of said levers constructed in bow shape, spring clips engaging theother end of said pairs of contact knives, and an insulating boardcarrying said clips.

WILHELM QUANTE.

